In this paper novel interleaved boost converter (IBC) with snubber circuit is presented. It is compared with conventional boost and IBC. In the proposed topology current stress on each switch is one fourth of input current. Simulation comparison is done for 1hp universal motor and it is proved that proposed converter gives near to the designed values of output voltage, current and power. Ripples in boost, IBC and proposed IBC system are compared. Ripples of the parameter voltage, current and power are reduced with snubber. Also proposed system with hard switching efficiency is about 92% and its efficiency is increased to 93.37% with soft switching.

1. Soft-Switching and Low Ripple Interleaved Boost Converter with Photo-Voltaic System to Drive Universal Motor
IRJPEE
Soft-Switching and Low Ripple Interleaved Boost
Converter with Photo-Voltaic System to Drive Universal
Motor
*Prasanna Kumar C1, Mahesh M2 and Chowdareddy V3
1,2,3
Department of EEE, PESIT, Bangalore, India
In this paper novel interleaved boost converter (IBC) with snubber circuit is presented. It is
compared with conventional boost and IBC. In the proposed topology current stress on each
switch is one fourth of input current. Simulation comparison is done for 1hp universal motor and
it is proved that proposed converter gives near to the designed values of output voltage, current
and power. Ripples in boost, IBC and proposed IBC system are compared. Ripples of the
parameter voltage, current and power are reduced with snubber. Also proposed system with hard
switching efficiency is about 92% and its efficiency is increased to 93.37% with soft switching.
Keywords: conventional Boost, IBC, PV system, PWM ICs, soft switching.
INTRODUCTION
Since almost every house has the 1hp motor to pump the
water to the overhead tank. When the conventional energy
demand is more than generation, the alternative renewable
that to photovoltaic (PV) is the better choice. The
conventional boost is not advisable for more than 300W
applications. Hence IBC, initially these IBCs was used for
low power applications like spacecraft, satellite
applications. If the IBC is operated exactly at 50% duty
cycle the total ripple can be reduced to zero. The most of
the applications required the converter to give more voltage
gain. During this requirement IBC is the preferable
complementary metal oxide (CMOS) with coupled inductor
IBCs developed to handle high circulating current [Ho et al.,
2011; Xu et al.,2011; Van Nguyen et al., 2011; Everts et
al., 2012; Zhang et al., 2012; Zhao et al., 2012).
IBC also reduces the Equivalent Series Resistance (ESR)
of the capacitor. The reverse recovery problem of power
diodes is overcome with use of Silicon Carbide (SiC)
diodes. Other IBCs are developed with the use of current
source driver (CSD) and digital signal processor (DSP) for
the closed loop operation. Since it is operating at high
frequency and working in CCM (Do and H-L, 2011; Chang
et al., 2012; Freitas et al., 2015; Garcia et al., 2013). The
closed loop operation is obtained with use of pulse width
modulation integrated circuits (PWM ICs) (e Silva et al.,
2014; Fukaishi et al., 2013; Zhang et al., 2014).
The block diagram of proposed system as shown in Fig.1
solar modules can be installed and connected to the
proposed converter. Since the particular application is to
pump the water to the overhead tank, it is preferable to use
solar energy directly to the proposed converter with proper
devices like power diode and capacitor bank. It makes to
save lot of money on storage through battery. PWM ICs
are used for the close loop operation and required phase
difference between switching pluses.
Fig.1. Block diagram of proposed system
*Corresponding author: Prasanna Kumar C, Department
of EEE, PESIT, Bangalore, India. Email:
cpkme@yahoo.com
PV
System
IBC with
PWM ICs
Universal
Motor
International Research Journal of Power and Energy Engineering
Vol. 3(2), pp. 051-055, November, 2017. © www.premierpublishers.org, ISSN: 3254-1213x
Conference Paper

2. Soft-Switching and Low Ripple Interleaved Boost Converter with Photo-Voltaic System to Drive Universal Motor
Prasanna et al. 052
The operation of this particular application need only few
hours a day. Once the investment is made on solar module,
it is advisable to invest on batteries so that the house power
will be off-grid. The proposed system will work without
isolation transformer so that its weight reduced and
became portable.
Proposed IBC to drive 1hp Universal motor
In the circuit four PV modules of each 240WP and 12V are
can be placed at the terrace. These modules are connected
in series so that total input voltage about 48V is boosted to
230V. The amount of power required will be obtained from
the solar module. If it through battery required power is
available to drive the load as well as white goods. The
modification in conventional IBC is made in proposed
system by making switching in parallel. This modification
has the advantage is that current stress on each switch is
very much reduced. Hence it is possible to operate this
converter without isolation transformer.
Fig. 2 Circuit diagram of proposed converter
In the above circuit source is PV system, as it mentioned
that application is only in the day time no need of storage.
As the IBC is became more popular of high power
applications by making connections of two conventional
boosts in parallel. In the proposed converter attempt is
made to reduce further by connecting two switching in
parallel per leg to work together as a single switch.
Inductor Design for Proposed IBC:
The inductor design for the conventional IBC and the
proposed system are the same. The total value obtain can
be made exactly half for IBC and for proposed IBC system.
This can be preceded as
E=
1
2
𝐿𝐼2
(1)
𝐴 𝑝 =
2𝐸
𝐾 𝑤 × 𝐾𝑐 × 𝐽 × 𝐵 𝑚
(2)
Where:
Ap –area product, E-energy, Kw&Kc are constants,
J-current density, Bm- Max. flux density
𝐼 𝑀 = 𝐼𝐿 +
∆𝐼𝐿
2
(3)
Where:
IM- peak current, IL-inductor current, ∆IL-change in inductor
ripple current
Considered the standard values of KC=1, KW=0.6, BM=0.2T
& J=3*106 A/M2
Hence
E=4.38*10-3 Joules
𝑁 =
𝐿𝐼 𝑀
𝐴 𝐶 𝐵 𝑀
(4)
Where:
N-no.of turns, L-inductance and AC-core area
AC=1.82 mm2, πr2 = 1.08mm2, r=0.58mm, dia=1.16mm,
SWG=18
𝑙𝑔 =
𝜇0 𝑁2
𝐴 𝐶
𝐿
(5)
Where:
Lg-air gap, µ0-absolute permeability
lg=1.55mm, IM=3.54A, therefore L=0.7mH
Simulation and comparison
In this section of paper, comparisons of conventional boost,
conventional IBC and modified IBC are presented.
Comparison of IBC with modified IBC along with soft-
switching is done. These converters are designed and
simulated for 1hp load. Fig.3 is the normal boost simulation
circuit and its output current, voltage and power are
obtained as shown in Fig.4from the Fig.5 shows that
current stress on switch is about 16A.
Fig.3 Conventional Boost converter
Fig.4 output current, voltage and power waveforms of Boost
Converter

3. Soft-Switching and Low Ripple Interleaved Boost Converter with Photo-Voltaic System to Drive Universal Motor
Int. Res. J. Power Energy Engin. 053
Fig.5 switching current through switch of boost converter
Fig.6. Conventional IBC without snubber
Fig.7. Output current, voltage and power waveforms of IBC
Fig.8. switching currents through switchs of IBC
Fig. 9. variation of voltage,power and current with different
percentage of duty cycle of IBC
Fig.10. Proposed IBC with snubber
current≥16A
current≥8A

4. Soft-Switching and Low Ripple Interleaved Boost Converter with Photo-Voltaic System to Drive Universal Motor
Prasanna et al. 054
Fig.11. output current, voltage and power waveforms of
proposed IBC with snubber
Fig.12. switching currents through switchs of proposed
IBC
Fig.13. variation of voltage,power and current with
different percentage of duty cycle of IBC with snubber
Table 1: Comparison of boost, IBC and proposed IBC
Parameters Boost IBC IBC-with
snubber
Output current (A)
(Theoretical=3.25A)
3.2 3.22 3.24
Output voltage (V)
(Theoretical=231V)
225 228.5 230.8
Output power (W)
(Theoretical=750W)
720 736 748
Inputcurrent (A) (Input
voltage(48V)
16.5 16.667 16.68
Efficiency (%) 90.9 92 93.37
Fig.6 is the conventional IBC, where the simulation of circuit
is performed. Fig.7 is the output parameter with ripple is
present for few microseconds. In the Fig.8 input current is
equally shared because of interleaved, current stress on
switches is reduced by 50% compared to boost converter.
Fig.9 voltage, power and current variations with different
percentage of duty cycle of IBC. Fig.10 is the simulation of
proposed IBC with snubber. Fig 11 indicates except the
transient, output current voltage and power waveforms are
doesn’t have the ripple. Fig.12 shows that current stress on
switches is reduced by one fourth compared to boost. Fig.
13 is similar to that of conventional IBC, so with the
modification, the operation of IBC remains the same only
the current stress on switches reduces. Table 1 compares
the electrical parameters of boost, IBC and proposed IBC
system where the parameters obtained from proposed
converter are more suitable.
current≥4A

5. Soft-Switching and Low Ripple Interleaved Boost Converter with Photo-Voltaic System to Drive Universal Motor
Int. Res. J. Power Energy Engin. 055
CONCLUSION
The proposed system is evaluated for 1hp load,
comparison of boost, IBC and modified IBC are simulated.
Soft switching is implemented for the proposed converter
where the efficiency is increased about 2.47% compared
to boost and it is 1.37% more compare to IBC. With the
comparison of these three converters with soft switching
and modification of IBC is more appropriate for high rating
applications.
With the application consider to drive universal motor
proposed system is more suitable and not depends on
conventional and also one-time investment makes the
system is almost free for other fifteen years. Future scope
is to develop hardware with the proposed converter along
with hardware suitable snubber.
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Accepted 23 October, 2017
Citation: Prasanna KC, Mahesh M and Chowdareddy V
(2017). Study H and Estimation of Energy Transfer to the
Active DC-Link Capacitor Due to Harmonic Current.
International Research Journal of Power and Energy
Engineering, 3(2): 051-055.
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